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Proceedings Papers

Rotating Mechanism of Diffuser Stall in a Centrifugal Compressor With Vaneless Diffuser

Nobumichi Fujisawa, Yuki Agari, Yoshifumi Yamao, Yutaka Ohta

Proc. ASME. GT2021, Volume 2D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V02DT39A010, June 7–11, 2021

Paper No: GT2021-59869

DOI: https://doi.org/10.1115/GT2021-59869

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Topics: Compressors, Diffusers, Vaneless diffusers

Proceedings Papers

The Unsteady Behavior of Diffuser Stall in a Centrifugal Compressor With Vaneless Diffuser

Hiroshi Miida, Kenta Tajima, Nobumichi Fujisawa, Yutaka Ohta

Proc. ASME. FEDSM2020, Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation, V001T01A006, July 13–15, 2020

Paper No: FEDSM2020-20128

DOI: https://doi.org/10.1115/FEDSM2020-20128

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Topics: Compressors, Computational fluid dynamics, Diffusers, Vaneless diffusers

Proceedings Papers

Development of Rotating Stall Cell Under Coexisting Phenomena of Surge and Rotating Stall in an Axial-Flow Compressor

Yuu Sakata, Shuji Ando, Nobumichi Fujisawa, Yutaka Ohta

Proc. ASME. AJKFluids2019, Volume 3A: Fluid Applications and Systems, V03AT03A024, July 28–August 1, 2019

Paper No: AJKFluids2019-5310

DOI: https://doi.org/10.1115/AJKFluids2019-5310

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Topics: Axial flow, Compressors, Surges

Proceedings Papers

Transient Analysis of Rotating Stall Development in a Centrifugal Compressor With Vaned Diffuser

Nobumichi Fujisawa, Masaki Takahashi, Yutaka Ohta

Proc. ASME. GT2019, Volume 2A: Turbomachinery, V02AT45A010, June 17–21, 2019

Paper No: GT2019-90797

DOI: https://doi.org/10.1115/GT2019-90797

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Topics: Compressors, Diffusers, Transient analysis, Impellers, Transients (Dynamics), Separation (Technology), Vortices, Computational fluid dynamics, Numerical analysis, Pressure

Journal Articles

Evolution Process of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser

Nobumichi Fujisawa, Tetsuya Inui, Yutaka Ohta

J. Turbomach. April 2019, 141(4): 041009.

Paper No: TURBO-18-1289

DOI: https://doi.org/10.1115/1.4042249

Published Online: January 21, 2019

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Topics: Compressors, Diffusers, Flow (Dynamics), Impellers, Pressure, Pressure measurement

Proceedings Papers

Interaction Between Surge Behavior and Internal Flow Field in an Axial-Flow Compressor

Yuu Sakata, Nobumichi Fujisawa, Yutaka Ohta

Proc. ASME. FEDSM2018, Volume 3: Fluid Machinery; Erosion, Slurry, Sedimentation; Experimental, Multiscale, and Numerical Methods for Multiphase Flows; Gas-Liquid, Gas-Solid, and Liquid-Solid Flows; Performance of Multiphase Flow Systems; Micro/Nano-Fluidics, V003T12A016, July 15–20, 2018

Paper No: FEDSM2018-83172

DOI: https://doi.org/10.1115/FEDSM2018-83172

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Topics: Axial flow, Compressors, Internal flow, Surges, Flow (Dynamics), Pressure, Cycles, Pressure gradient, Pressure measurement, Stall inception

Proceedings Papers

Evolution Process of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser

Nobumichi Fujisawa, Tetsuya Inui, Yutaka Ohta

Proc. ASME. GT2018, Volume 2A: Turbomachinery, V02AT45A008, June 11–15, 2018

Paper No: GT2018-75462

DOI: https://doi.org/10.1115/GT2018-75462

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Topics: Compressors, Diffusers, Impellers, Computational fluid dynamics, Boundary layers, Flow (Dynamics), Numerical analysis, Pressure, Pressure measurement, Separation (Technology)

Proceedings Papers

Unsteady Behavior of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser

Nobumichi Fujisawa, Daiki Ema, Yutaka Ohta

Proc. ASME. GT2017, Volume 2D: Turbomachinery, V02DT46A005, June 26–30, 2017

Paper No: GT2017-63400

DOI: https://doi.org/10.1115/GT2017-63400

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Topics: Compressors, Diffusers, Vortices, Flow (Dynamics), Suction, Corners (Structural elements), Impellers, Numerical analysis, Pressure measurement

Proceedings Papers

Effect of Incoming Wakes on the Stator Performance in a Single-Stage Low Speed Axial Flow Compressor Operating at Design and Near Stall Conditions

Guillaume Pallot, Dai Kato, Wataru Kanameda, Yutaka Ohta

Proc. ASME. GT2016, Volume 2D: Turbomachinery, V02DT44A037, June 13–17, 2016

Paper No: GT2016-57981

DOI: https://doi.org/10.1115/GT2016-57981

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Topics: Axial flow, Design, Stators, Wakes, Rotors, Pressure, Boundary layers, Compressors, Engineering simulation, Simulation

Proceedings Papers

Structure of Diffuser Stall and Unsteady Vortices in a Centrifugal Compressor With Vaned Diffuser

Nobumichi Fujisawa, Sota Ikezu, Yutaka Ohta

Proc. ASME. GT2016, Volume 2D: Turbomachinery, V02DT44A002, June 13–17, 2016

Paper No: GT2016-56154

DOI: https://doi.org/10.1115/GT2016-56154

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Topics: Compressors, Diffusers, Vortices, Flow (Dynamics), Impellers, Design, Leakage, Numerical analysis

Proceedings Papers

Numerical Prediction of Noise From the Internal Flow in a Centrifugal Blower

Yang Guo, Chisachi Kato, Yoshinobu Yamade, Yutaka Ohta, Taku Iwase, Ryo Takayama

Proc. ASME. AJKFluids2015, Volume 1A: Symposia, Part 2, V01AT09A005, July 26–31, 2015

Paper No: AJKFluids2015-09194

DOI: https://doi.org/10.1115/AJKFluids2015-09194

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Topics: Internal flow, Noise (Sound), Computational fluid dynamics, Acoustics, Blades, Fluids, Impellers, Large eddy simulation, Resolution (Optics), Sound pressure

Proceedings Papers

An AUV Yumeiruka for Seabed Topography Survey

Shojiro Ishibashi, Hiroshi Yoshida, Makoto Sugesawa, Yutaka Ohta, Frank Hsiao Fan

Proc. ASME. OMAE2015, Volume 6: Ocean Space Utilization, V006T05A026, May 31–June 5, 2015

Paper No: OMAE2015-41830

DOI: https://doi.org/10.1115/OMAE2015-41830

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Topics: Acoustics, Minerals, Navigation, Seabed, Seas, Underwater vehicles, Wings

Proceedings Papers

Evaluation and Prediction of Blade-Passing Frequency Noise Generated by a Centrifugal Blower

Yutaka Ohta, Elsuke Outa, Klyohiro Tajima

Proc. ASME. GT1994, Volume 1: Turbomachinery, V001T01A109, June 13–16, 1994

Paper No: 94-GT-334

DOI: https://doi.org/10.1115/94-GT-334

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Topics: Blades, Noise (Sound), Frequency response, Pressure, Density, Suction, Wakes, Dipoles (Electromagnetism), Sound pressure, Waves

Proceedings Papers

Unsteady Behavior of Leading Edge Vortex and Diffuser Stall Inception in a Centrifugal Compressor With Vaned Diffuser

Nobumichi Fujisawa, Shotaro Hara, Yutaka Ohta, Takashi Goto

Proc. ASME. FEDSM2014, Volume 1B, Symposia: Fluid Machinery; Fluid-Structure Interaction and Flow-Induced Noise in Industrial Applications; Flow Applications in Aerospace; Flow Manipulation and Active Control: Theory, Experiments and Implementation; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows, V01BT10A015, August 3–7, 2014

Paper No: FEDSM2014-21242

DOI: https://doi.org/10.1115/FEDSM2014-21242

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Topics: Compressors, Diffusers, Stall inception, Vortices, Flow (Dynamics), Computational fluid dynamics, Design, Impellers, Numerical analysis, Separation (Technology)

Proceedings Papers

Unsteady Flow Structure in an Axial Compressor at Windmill Condition

Takashi Goto, Dai Kato, Yutaka Ohta, Eisuke Outa

Proc. ASME. GT2014, Volume 2D: Turbomachinery, V02DT44A010, June 16–20, 2014

Paper No: GT2014-25609

DOI: https://doi.org/10.1115/GT2014-25609

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Topics: Compressors, Unsteady flow, Stators, Vortices, Flow (Dynamics), Pressure, Separation (Technology), Locks (Waterways), Shear (Mechanics), Suction

Proceedings Papers

Effects of Diffuser Vane Geometries on Compressor Performance and Noise Characteristics in a Centrifugal Compressor

Yohei Morita, Nobumichi Fujisawa, Takashi Goto, Yutaka Ohta

Proc. ASME. FEDSM2013, Volume 1B, Symposia: Fluid Machinery; Fluid Power; Fluid-Structure Interaction and Flow-Induced Noise in Industrial Applications; Flow Applications in Aerospace; Flow Manipulation and Active Control: Theory, Experiments and Implementation; Fundamental Issues and Perspectives in Fluid Mechanics, V01BT10A011, July 7–11, 2013

Paper No: FEDSM2013-16145

DOI: https://doi.org/10.1115/FEDSM2013-16145

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Topics: Compressors, Diffusers, Noise (Sound), Vortices

Proceedings Papers

Rotating Instability in a Centrifugal Blower With Shrouded Impeller

C. K. P. Kowshik, Daisuke Tsugita, Yusuke Takeyama, Yutaka Ohta

Proc. ASME. GT2012, Volume 3: Cycle Innovations; Education; Electric Power; Fans and Blowers; Industrial and Cogeneration, 685-694, June 11–15, 2012

Paper No: GT2012-68266

DOI: https://doi.org/10.1115/GT2012-68266

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Topics: Impellers, Vortices, Flow (Dynamics), Noise (Sound), Blades, Compressors, Computer simulation, Electromagnetic spectrum, Fans, Pumps

Proceedings Papers

Characteristics of Surge and Rotating Stall in a Three-Stage Axial Flow Compressor Using Shock Tube

Daisuke Morita, Yutaka Fujita, Yutaka Ohta, Eisuke Outa

Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 595-602, July 24–29, 2011

Paper No: AJK2011-22015

DOI: https://doi.org/10.1115/AJK2011-22015

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Topics: Axial flow, Shock tubes, Surges, Compressors, Compression, Waves, Pressure, Capacitance, Cycles, Ducts

Proceedings Papers

Unsteady Behavior and Control of Diffuser Leading-Edge Vortex in a Centrifugal Compressor

Yutaka Ohta, Takashi Goto, Eisuke Outa

Proc. ASME. GT2010, Volume 7: Turbomachinery, Parts A, B, and C, 1805-1813, June 14–18, 2010

Paper No: GT2010-22394

DOI: https://doi.org/10.1115/GT2010-22394

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Topics: Compressors, Diffusers, Vortices, Flow (Dynamics), Computer simulation, Noise (Sound), Visualization

Proceedings Papers

Frequency-Response Characteristics of Interaction Tone Noise Radiated From a Centrifugal Compressor

Yutaka Ohta, Shunsuke Masui, Toshiya Fuyumuro, Eisuke Outa

Proc. ASME. FEDSM2003, Volume 2: Symposia, Parts A, B, and C, 557-562, July 6–10, 2003

Paper No: FEDSM2003-45093

DOI: https://doi.org/10.1115/FEDSM2003-45093

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Topics: Compressors, Frequency response, Noise (Sound), Diffusers, Impellers, Pressure, Waves, Blades, Dipoles (Electromagnetism), Ducts

Journal citation

NARROW

Rotating Mechanism of Diffuser Stall in a Centrifugal Compressor With Vaneless Diffuser

The Unsteady Behavior of Diffuser Stall in a Centrifugal Compressor With Vaneless Diffuser

Development of Rotating Stall Cell Under Coexisting Phenomena of Surge and Rotating Stall in an Axial-Flow Compressor

Transient Analysis of Rotating Stall Development in a Centrifugal Compressor With Vaned Diffuser

Evolution Process of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser

Interaction Between Surge Behavior and Internal Flow Field in an Axial-Flow Compressor

Evolution Process of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser

Unsteady Behavior of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser

Effect of Incoming Wakes on the Stator Performance in a Single-Stage Low Speed Axial Flow Compressor Operating at Design and Near Stall Conditions

Structure of Diffuser Stall and Unsteady Vortices in a Centrifugal Compressor With Vaned Diffuser

Numerical Prediction of Noise From the Internal Flow in a Centrifugal Blower

An AUV Yumeiruka for Seabed Topography Survey

Evaluation and Prediction of Blade-Passing Frequency Noise Generated by a Centrifugal Blower

Unsteady Behavior of Leading Edge Vortex and Diffuser Stall Inception in a Centrifugal Compressor With Vaned Diffuser

Unsteady Flow Structure in an Axial Compressor at Windmill Condition

Effects of Diffuser Vane Geometries on Compressor Performance and Noise Characteristics in a Centrifugal Compressor

Rotating Instability in a Centrifugal Blower With Shrouded Impeller

Characteristics of Surge and Rotating Stall in a Three-Stage Axial Flow Compressor Using Shock Tube

Unsteady Behavior and Control of Diffuser Leading-Edge Vortex in a Centrifugal Compressor

Frequency-Response Characteristics of Interaction Tone Noise Radiated From a Centrifugal Compressor

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